Automatic high-temperature-alarm apparatus.



J. V. LUNDSTROM & KQ NIBLSEN. AUTOMATIG HIGH TEMPERATURE ALARMAPPARATUS.

APPLIGATIONTILED PEB.1G,1E)10.

Patented July 18, 1911.

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30111? "V. LUN'DSTROM AND KNUD NIELSEN, OF SGHENECTADY, NEW! YORK.

AUTOMATIC HIGH-TEMPERATURE-ALARM APPARATUS.

Specification of I etters Patent.

Application filed February 16, 1910. Serial No. 544,162.

To-all whom it may concern:

Be it known that we, JOHN V. Lonn- STROM and Knob NIELSEN, of whom JonnV. Imunsrnoir is a subject of the King oi Denmark and his on NIELSEN isa citizen of the United States, both residing at Schenectady, in thecounty of Schenectady and State of New York, have invented certain newand useful Improvements in Automatic lligh Temperature Alarm Apparatus,of which the i ollowing is a specification.

Our invention relates to automatic high-- temperature alarm. apparatus,and the object of our invention is to provide a device which may be soarranged that it will sound an alarm when. the temperature of apredetermined apartment or particular location in. en a srtiucnt shallhave reached a con tain predetermined degree, together with suchelements and combinations as are here inatler more particularly setforth and claimed. W e accomplish these objects by moons of theineclninisin illustrated in the accompanying drawings, in which:

Figure l u "rout elevation. Fig. 2- a side elevation. 3 :1. crosssection along the line X---X on 1. Fig. 4- a longitudinal section alongthe line Y--Y on Similar letters refer to similarparts throughout theseveral views.

The plate, A, is mounted. in uny suitable manner on thc side of the wallof an upurtineut or in any convenient place and has suitably mountedthereon by means of straps, o, 11., or in -any convenient. manner, thetube, ll, (preferably glass) provided with a bulb, (l, at one end inwhich tube Inn y be placed mercury, l), or other ingredient suitabletoruse in u thermometer. ldxtending into the bulb, C, at the bottom ofthe tube is a. connecting plug, E, which ongages the mercury, D, andhas, outside of the bulb, C, a contacting head, 1*, with wnich thespring contact or'switch, G, is electrically connected, by means of theplate, ,7 to the current'bcaring wire, ll, which is connected with oneof the poles of the elec tric bell magnet, J, the other pole oi themagnet, J, being connected with the battery, K, which will also beconnected by wire, is,

with the metallic tube, L, as hereinafter more particularly described.

9n the top of the tube, B, we place a cap, '6), which is formed upon orattached to the tube, e, which is preferably brass and which the tube atthat end.

carries a wire, M, secured in the end of the tube, L, preferably byinsulated contact screw N. W'c place within the tube, 0, a suitablepacking and rubber plugs n, u about the wire, M, as shown in Fig: i. En-

velo-ping the tube, 6, is the metallic tube,

L, which reciprocates upon the tube, 6, by means of the operation of apinion, O, and rack, P, the rack being, s cured. to the rear of the tubeas shown in Fig. 2, the pinion, 0, being mounted on a spindle, 7;,extending into the plate, A, and having a thumb screw, 9, projectingfrom the side of the plate to operate the same. 'We also preferablyarrange tor guiding or supporting, the tube, L, when it is raised on thetube, We attach the angle arms, f, f, to the plate, 1 above the end ofthe tube, (2, which angle arms project into suitable grooves, it, alonethe edge of the rack, P, at its junction with the surface of the tube,L. Thus the tube, l), when raised by the pinion will be prevented fromleaning to one side or the other and the location of the angle arms inreference to the tube may be adjusted to suit the necessities of thecase. The metallic tube, L, is closed at its upper end preventing airfrom entering, lie tube, 6, is closed at the end thereof which is withinthe tube, L, and also in lower end of said tube as shown in Fig. i. Thetube, B, is covered closely by the cap, b, on the tube, a. The mercuryin the tube, l, is therefore in substantially an airtight apartment.

Attached to the tube, L, is a pointer, R, which registers with 21 scale,S, attached to the plate, .A. It is apparent that. the position of theend of the wire, M, within the tube, ll, will be indicated on the sca e,S, by the pointer, R, since the wire is attached tothe tube, 1/, andwhen that tube is moved toward the tube, ll, the wire will move towardthe bottom oi the tube and its relative position therein will beindicated by he pointerattached to the tube, L, on the scale, to. \Vepreferably pluw on the scale, S, figures extending from zero to onehundred.

and eighty, for the purpose oi 'indiceting respectively the degrees ofheat necessary to cause the inecury in the tube, B, to rise andinin'iersc the end of the wire, M, at its position when the pointerregisters with the several degrees on the scale. NVe also place on theplate, A, above the tube, L, a. projection, T, whiclris in the path ofthe move ment otthe tube, L, and will act as a stop Patented July 18,19311.

stance to prevent the tube from being moved out of contact with thetube, e, therefore preventing its falling and breaking.

The operation of our invention is easily understood. The wire connectedwith the e'ndof the tube, L, being in contact with the wire, M, in thetube by means of the insulated contact screw, N, leads to the battery,K, the battery being in circuit with the bell magnet, J, whereby thebell, U, may be runghnd with the wire, la, in contact with the plug E,which. is immersed with the niercury D, in the tube, B. Thus when themercury, D, is raised by the temperature of the room in which it isplaced so that it will immerse the end of the wire, M, the circuit iscompleted and the bell is rung.

Our invention is inexpensive in construction, simple in operation andperforms the functions equired' of it in a positive and SlIl lSIEi etorymanner. No parts are exposed which are liable to become disadvantageously aii'ected by the action of the elements. it is notcumbersome, takes but little room, attractive in appearance and iseasily adjusted to the circumstances requircd regarding the amount ofheat necessary in order to girean alarm. It may be used not only in caof a fire, but also for the purpose of notifying lheoilice that thetemperature of a cold storage or other plant had become too great.

The tube, B, constructed of such size that tho mercury will not becomeseparated into particles after it has engaged the wire. \Vhcn thetemperature decreases if the tube is too contracted the mercury is quitelikely to become broken up because of the friction between the sides ofthe glass tube and the wire. F

We do not want to limit ourselves to the material of: which we constructthe variousparts of our device, although we have referred to a brasstube. et as: any suitable .material will come within the scope of ourvinvention.

\Vherc age ha \"c referred in the speciliczu tioi ri'and rilainis tomercury, we mean to be understood as including any suitable subwhi hwill readily indicate the cl'iangcs i i temperature and adapted for usein tbermoim-lcrs. We have referred to the use of a bz-ll mania-t, but wedo not want to limit oursclroi: to that particular means For iring analarm. lVhere we harlreferred to the term uh-c" herein we mean toinclude.

not only a wire oi one thickness throughout,

but. it necessary,.niil'ering in diameien What we claim as our inventionand desire thermometer enveloping tube and with said spring con tact;and an alarm device placed in circuitwith the battery and said contacts,substantially as described.

The combination of glass containing an expansible liuid; a metallictube; a cap on one end of said tube adapted to fit over one end of saidglass; an enveloping tube closed at one end adapted to reciprocate onsaid metallic tube; a wire connected at one end to the closed end of'said enveloping tube and extending through said metallic tube into thethermometer glass; a connecting plug inserted in the thermometer glass;:1 spring contact; adapted to engage said plug; a battery; an alarmdevice; wires connecting said spring contact and said wire in themetallic tube in circuit with the battery and alarm device when thefluid contents of the glass tube engage the wire therein; and a int-ansfor indicating the extent of the projection of the wire into thethermometer glass.

3. The combination of a thcrmmneter glass containing an cxpansiblcfluid; a molallic tube; a cap on one cud oi the tube adapted to fit overone end of said glass; on envelo jiing tube closed at one end adapted torta-iprocate on said metallic iubez'a wire;

a contact for said wire at the closed end ofsaid envcloiing' tube, saidwire extending through said metallic tube into the said glass tube; ametallic plug inserted in said glass tube; a contact for that port ionol" said plug which is exterior to said tube; an alarm device; abattery; wires connecting said (ontact adapted to engage said plug' andsaid contact connecting the wire in the metallic tube with theenveloping lube; and a means -i'or iiulirrlingthe position of the\.'ll't in the lllll'llHillHlll glass substantially as described.

4. The combination oi" a lliermomclci. 'lass containing an cxpausihlofluid; a motallic tube adapted to lit onto the end of said glass; anenveloping a thermometerv tube adapted to reciprocate on said niclalliclul to secure by Letters Patent, is: a. wire; a contact for said wire atthe end of 125 l. i \u automatic dovic'c for registering an. saidenveloping tube, said wire extending alarm, comprising a thermometerglass; a through said metallic tube into the said thcr metallic tube; acap on the end of thi tube mometer glass; plugs of non-conducting adultcd to fit over the end oithe. thermomesubstan't-o in said i'nelallictube near each tor glass; an enveloping tube closed at one end thereof;an electric connecting plug; in-

eee,252

serted in said thermometer, glass; a contact for said electricconnecting plug exterior of said glass; an alarm device; a battery; av

means for placing in circuit with said battery the alarm device and eachof said contacts; and a means for indicating the position of the wire inthe thermometer glass.

5. The combination with a thermometer glass containing expansible fluidof a tube provided with a cap; plugs of non-conducting substance in saidtube near each end thereof; the end of said thermometer glass snuglyenveloped by said cap; an enveloping tube adapted to reciprocate uponsaid first mentioned tube; a wire extending through said first mentionedtube and through said plugs therein and into said thermometer lowered inthe thermometer glass; a means for electrically connecting the contentsof said thermometer glass and said wire with a battery; an alarm devicein the circuit between said wire and the contents of said thermomet erglass.

In testimony whereof we have afiixed our signatures in presence of twoWitnesses.

JOHN V. LUNDSTROM. KNUD NIELSEN. Witnesses:

FREDERICK W. CAMERON, J. W. FISHER.

